Machine for forming sand cores.



YPATBNTED FEB. 20, 19os.

0.0. KORNS. MACHINE FOR FORMING SAND cons.

APPLICATION FILED JULY 21. 1903.

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V WITNESS S: fi-ffi- 6. 7% %ww vi No. 812,852. PATENTEDTBB. 20, 1906.

. G. G. KORNS.. MACHINE FOR FORMING SAND OORBS.

APPLICATION FILED JULY 21. 1903.

YIIIIIIIIIIIIIIIIIIIIIIIIO 's ATTORNEY.

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ing-rods D.

UNITED STATES PATENT onrioni CLARENCE C. KORXS. OF J OPINSTOWN PENNSYLVANIA, ASSIGNOR TO THE -LORAIN STEEL COMPANY, A CORPORATION OF PENNSYLVANIA.

MACHINE FOR FORMING SAND CORES.

To (2J7 whom it 771161] concern:

Be it known that I, CLARENCE C. Konxs, of Johnstown, in the county of Cambria and State of Pennsylvania, have invented a new and useful Improvement in Machines for Forming Sand Cores, of which the following is a full, clear, and exact description, reference being had to the accompanying drawin s. which form a part of this specification.

ily invention has relation to certain new and useful improvements in mechanisms for forming sand cores, and is more particularly an improvementupon the machine described and claimed in the patent to \Yeeks and O'Brien, No. 727,517, dated May 5, 1903.

In making cores with draft in them it is desirable to invert the cores in removing them from the boxes and while they are being dried and baked in order to preserve their form: and the objectof the present invention is to provide a machine having means of simple and eflicient character whereby the cores formed therein may be delivered in invert-ed position.

To this end my invention consists in the novel construction and combination of parts, all as hereinafter described, and pointed out in the appended claims, reference being had to the accompanying drawin s, in which Figure 1 is a view in side e evation, with a portion of the cylinder broken away, of a machine embodying my invention; and Fig. 2 is a side elevation of the machine with the corebox in inverted position. elevation, andFig. 4 is a detail sectional view showing the core-ejecting devices.

The letter A represents the frame of the machine; B, the cylinder, which raises and lowers the core-box table C toward and away from the fixed platen D by means of the lift- E is the pipe which supplies compressed air, steam, or other motive power to said cylinder.

F is the core-box, removablv secured to the table C and having a bottom F", movable verticallv in said box to eject the formed 'core F indicates the plunger working in a cylinder F. which actuates said movable bottom, and F 4 is aflexible pipe for supplying power to said cylinder.

As thus far described the parts are generally similar in construction and arrangement to corresponding parts in the machine shown in the above mentioned patent, to which Specification of Letters Patent. Application filed July 21, 1903. Serial No. 166,489.

Fig. 3 is an end Patented Feb. 20, 1906.

entirely inverted or turned from the position shown in Fig. 1 .to the posit-ion shown in Fig. 2. This is effected by means of a hand-wheel 'H, which is secured to one. of the extended journals or trunnions c. This wheel has a projection 71, which cooperates with stops 71' h to prevent the wheelfrom being turned more than a, half-revolution. Parallel with the st p 71, which is extended vertically to a point 1:: ear the normal level of the table C, is a. guide-rib I1 "hen the core-box is being raised against the fixed platen to ram the sand therein, the projection h on the wheel moves between the stop h and guide 72 and is thus held from turning.

I, Fig. 2, is acore-receiving plate which is adapted to be placed over the top of the corebox, where it is locked by the clamping-arms J, actuated by an eccentric lever K through- -connections L.

M is a bifurcated support carried by a footlever N, pivoted at m.

O is a spring for returning the plunger F after the formed core has been ejected.

The operation of the machine is as follows: The box while in the position shown in Fig. 1 is filled with sand. Power'is then admitted to the cylinder B and the box is raised against the fixed platen D, which rams the sand. Cylinder B is then exhausted and the corebox and its table falls by gravity to its former position. The receiving-plate is now placed over the box and is secured by the clamps. The'handavheelis next turned to invert the box and the support M is raised bv the footlever into position to catch said plate, as shown in Fig. 2, and the clamps are released. Air is admitted to the cylinder F thereby actuatingfthe movable bottom of the box to thereby eject the core, the support M being permitted to recede as the core is ejected. The plate. with the core thereon, is now re I have, however, shown separate moved,'thecore-being baked or dried on said plate without handling. The spring O,which has been compressed b the ejecting movement, now returns the ottom F to its nor mal position. Finally, the core-box is turned back into position to receive another charge nation of a-fixed platen, an invertible table mounted below said platen to reciprocate toof sand. t

Both the core-box and the fixed platen are preferably made removable, so that different boxes for diflerent cores may be used on the same machine.

I do not wish to limit myself to the particular details of construction and'arran e ment which I have herein shown and escrib'ed, as various changes may be made therein without departing from the spirit and scope of my invention as it is defined in and by the followin claims. Having thus I claim as new, and tens Patent, is.

1. In ,acore-f'ormingmachine, the combi' nation of an invertib e table, a corebox mounted thereon, power-operated means for reciprocating said box and table toward anddesire to secure by Letescribed my invention, whatj from a fixed platen, a power-operatad ejector carried by the said table, means for inverting said table and for retaining the core therein during inversion, and a movable core-receiving supportbelow the said table.

2. In a core-forming machine, the combiward and away from the same, a core-box mounted on'said table, a poweroperate.d ejector carried by said table, and a'support for receiving the inverted ejected core.

3. In a core-forming machine, the combi- 'nation witha'fixed platen, of vertical guides belowthe' same, a core-bbx-sripporting table pivotally carried in-boxes which are arranged to reciprocate in said guides, and stop devices for preventing -tliemversion of the table on its pivotsexcept at a certain position.

In testimony whereof I have affixed my 5 signature in presence of two'wit'nesses.

. CLARENCE C. KORNS. VVitnesses':

Y-GEOL H. PARMELEE, H. W. 'Snrru. 1 

